Gland for rods and plungers.



. No. 887,128. PATENTBD MAY 12, 1908.

G. H. ROBINSON.

Q GLAND FOR RODS AND PLUNGERS.

APPLICATION IILEI) 0M. 20, 1905. v

2 SHEETS-SHEET 1.

m VENT!) R W/n/ ss s ja /Maw MW 2. Mq a Vmq E PATENTED MAY 12, 1908. G.H. ROBINSON.

GLAND FOR RODS AND PLUNGERS.

2 SHEETS-SHEET 2.

APPLICATION FILED 001220, 1905.

W/T/VESSES UNITE STATEG PATENT OFFIIQE;

GEORGE HUNTER ROBINSON, OF SUNDERLAND, ENGLAND, ASSIGNOR TO ASPLANBELDAM, GEORGE WILLIAM BELDAM, AND OYRIL ASPLAN BELDAM, TRADING AS THEBELDAM PACKING & RUBBER COMPANY, OF LONDON, ENGLAND.

GLAND FOR RODS ANDgPLUNGERS.

Specification of Letters Patent.

Patented May 12, 1908.

Application filed Octoberl20, 1905. Serial No. 283,701.

To all whom it may concern:

Be it known that I, GEORGE HUNTER R013- INSON, a subject of the King ofEngland, residing at Sunderland, in the county of Durham, England, haveinvented new and useful Improvements in Glands for Rods and Plungers, ofwhich the following is a specification.

This invention has reference to packings for making a fluid-tight jointbetween a cylinder or chamber end, cover, or other art, and a rod,plunger, or the like, wor ing through it, the rod or plunger being thatof an engine, pump, or machine, from the cylinder or chamber of which itis desired to prevent the escape of fluid, or into which the entrance offluid is to be prevented.

The packing according to this invention is of spira form, and is adaptedto be adjusted to, or in relation to the rod or part to be packed, bywinding or pulling on, by mechanical means, one or both ends, or asuitable part or parts of the packing and it comprises a portion or partwhich presses on the surface of the rod or part to be packed, and aband, cord, chain, spiral spring, or the like, in connection with saidformer part, by means of which the actual tension on, or su port to, andadjustment of the packing in re ation to the part in connection withwhich it works, is effected.

The invention will be further described With reference to theaccompanying drawmgs.

Figure 1 is a sectional elevation, Fig. 2 a

lan in section at A A Fig. 1, showing one form; and Fig. 3 and Fig. 4are sectional elevations, showing two other slight modifications.

The same letters of reference denote the same or equivalent partswherever they occur in the different drawings.

Referring first more particularly to Figs. 1 and 2, a represents theflexible portion of the packing which comes in actual contact with therod or' other part with which a fluid tight joint is to be made; and bis the part by means of which the actual tension on, or support to, andadjustment of the packing in relation to the rod or other part iseffected;

and which, in the case shown, consists of a band of steel or othersuitable metal, on and covering the outside or back of the part a.

c and d are rings of angle section in the construction shownto which theends of the band I) or part a, are fastened.

0 represents the rod to be packed.

p is the existing stuffing box of the cylinder in which the rod 0 works;and g is the box within which the packing is placed; it being held onthe box p by studs and nuts 1". A plate 8 is introduced between the boxq and the box 10, against one surface of which, the ring 0 of thepacking bears, and with which it makes a fluid-tight oint.

The ring (1, to which one end of the band I) is suitably attached, isprevented from turning by aprojection e upon it, the edge of whichengages with one of the bolts r; while the other ring a, to which theother end of the metal band I) is attached, is adapted to be rotated andfor this purpose is provided with teeth f, forming a worm wheel on itseriphery, which are engaged and worked by. a worm g inside the box g, ona spindle h, one end i of which projects through the box, and by whichit is adapted to be turned; a gland or stufling box j being providedaround the 1sapindle h, to make a fluid tight joint with the ox g.

At one end of the packing, springs 70 are provided, which giveelasticity longitudinally to it, and enable the lengthening of thepacking to take place when adjusted by the adjusting means, due to thecoiling on of same as itbecomes worn. InFigs.1 and 2, these end springs70 are at the outer end of the box g, and are supported by its end, atone end, andv with their outer ends they press upon a flanged ring Z,which passes through the end of the box 9; a tight joint with which iseffected by the gland and packing m. The inner end or flange of thisring 1 bears upon the underside of the ring (1, and makes a joint withit.

When the packing becomes worn, it is ad justed on to the rod 0 byturning the spindle h, which through the Worm g, and the worm teeth f onthe ring 0, pulls or winds up the metal band I), and. with it, thepacking a to the required degree of tension; and this can be efiected,while the engine or machine is running.

In the case shown in Figs. 1 and 2, the stuffing box p is filled withmetallic rings it, carried in a central ring '0, to which lubricant canbe easily supplied.

The packing a which actually comes in contact with the rod, may be asoft packing, or a compound packing of soft material and flexi ble orother suitable metal, or of metallic parts made up in pieces, which areconnected to and supported by the continuous adjusting and holdingbands, cords, or .the

like, I); and the form and nature of this part will depend upon thenature of the packing part a. For instance, in the case shown, thisouter part b is in the form of a band, and the packing material a isassumed to be of soft or flexible type, and its outer surface or part issupported by and rests on the band I), and the tension is appliedspirally to it for adjusting it; but in other cases, as stated, metalliccords orwires, or coil springs may be used in connection with the part(1, either at the back, or even extending through it, or in any othersuitable way, but preferably at the back; the ends of which cord orspring, or the part a, or both, are connected up with the adjustingrings 0, (1, so that when these rings are rotated in relation to eachother, or one of them is, the band, cord, or spiral spring will applypressure spirally to the packing materlal a, and adjust it on to, andhold or support it up to the rod or part to be packed.

In Fig. 3, the springs 7c, by which the automatic longitudinaladjustment for the increase of length of the packing lengthwise on therod, due to the coiling up of a greater length of it on to it, iseffected, are placed be tween the rings a in the stuffing box 19, andthe bottom of such stufling box; and the outer ring (1 of the packingrests on the outer end of the box g, and makes joint with it. In thiscase, also, the outer end ring (I of the packing is provided with wormteeth f, and is adapted to be rotated through these teeth, and the wormg; and the ring 0 is prevented from being rotated by a pin it, whichengages with or passes through a projection e on the ring 0.

In Fig. 4, the spiral packing is adapted to fit and work partly in theexisting packing box 1) of an engine cylinder and partly in a short boxq, fixed on the outer end of same. The lower ring (1 in this case isprovided with teeth 1, and is rotated by the worm g similarly as in Fig.3 but in this case, the automatic longitudinal adjustment of the packingby means of the springs 7c, is allowed to take place at this outer endof the packing,

similarly as in Figs. 1 and 2.

The inner ring 0 is prevented from being rotated by means of pins n,fitted in the ends other part to be packed; a spiral flexible binder inconnection with said other packing part, for holding and pressing it tothe rod or other part to be packed; a ring at one end of said spiralpacking, to which one end of said binder is connected, having teeth uponit; a casing in which said packing is disposed; a worm wheel supportedby and within the said casing, and meshing with the teeth of said ring;and an actuating shaft on said worm wheel extending through the casing;

substantially as set forth.

2. An engine or machine packing comprising a spiral packing part whichacts on I the surface of the rod or other part to be packed; a spiralmetal flexible binder on the outside of said packing part, for holdingand pressing it to the rod or other part to be packed; a ring (a, d) atthe ends of the packing to which each end of said binder is attached; anouter casing to the packing;

rotative actuating means connected with one of said rings and adapted tobe operated from outside the said packing casing; and springs (7c) inconnection with one of the end rings for admitting longitudinalextension of the packing when spirally wound on the rod or other part;substantially as set forth.

3. An engine or machine packing comprising a spiral packing part whichacts on the surface of the rod or other part with which a fluid-tightjoint is to be maintained, spirally arranged around the said rod orother part to be packed; a' spiral flexible binder on the outside ofsaid packing part, for holding and pressing it on to the rod or otherpart to be packed; a ring at each end of said spiral packing, to whichsaid binder is attached; a casing in which said parts are contained; abush (Z) in connection with the said outer ring, and extending throughand making joint with the end of the casing, and with the outer face ofthe said ring; and springs (75) between the inside of the end of thecasing and the bush, and pressing the said bush onto the said outerring; substantially as set forth.

4. In an engine or machine packing, the combination of a rod 0; thepacking a wrapped spirally around the said rod; a ring a at andconnected with the inner end of said packing; a ring d at and connectedwith the outer end of said packing; a casing g containing said packing;a bush Z making joint at its inner end with the ring d, and passingthrough said casing and making oint therewith; a packing m between thejoint between the casing and the shaft 71/, as said bush Z and the .endof the casing q; set forth.

springs 7c disposed between the inner end of In testimony whereof I havesigned my the case g and the inner part of the bush 1; name to thisspecification in the presence of 5 teeth f on one of said rings (0, d);a worm two subscribing witnesses.

Wheel 9 meshin with the teeth f, and supi ported by and 561mm the casingq; an actul GEORGE HUNTER ROBINSON ating shaft h connected with the wormg, Witnesses:

and extending to the outside of the casing; I H. D. JAMEsoN, 10 and apacking j for making a fluid-tight i A. NUTTING.

